TPO and Infertility: Thus, the present study aimed to investigate the impact of autoimmune antibodies, namely, anti-TPO, detected in the sera and follicular fluids of women with infertility and autoimmune thyroiditis, on main ovarian reserve characteristics and embryological outcome of in vitro fertilization programs, contributing to better understanding of the mechanisms by which AITD is able to impair fertility in euthyroid women.